发明名称 |
METHOD FOR COATING A CATALYSED PARTICULATE FILTER AND A PARTICULATE FILTER |
摘要 |
Method for the preparation of a wall flow particulate filter catalysed at its inlet side with a first catalyst having activity in the removal of residual hydrocarbons and carbon monoxide and catalysing at rich burn engine operation conditions the reaction of nitrogen oxides with hydrogen and/or carbon monoxide to ammonia and catalysed at its outlet side with a second catalyst having activity in the selective reduction of NOx by reaction with ammonia being formed in the inlet side. The method involves the provision of a first catalyst having a particle size larger than the filter wall mean pore size, and a second catalyst having a particle size smaller than the filter wall mean pore size, and mixing the first and second catalyst into one suspension, which is used for wash-coating from the inlet end. The second catalyst thereby diffuses into the partition wall. |
申请公布号 |
EP2731720(A1) |
申请公布日期 |
2014.05.21 |
申请号 |
EP20120728485 |
申请日期 |
2012.06.14 |
申请人 |
HALDOR TOPSØE A/S |
发明人 |
GABRIELSSON, PÄR L.;JOHANSEN, KELD |
分类号 |
B01J35/04;B01D53/94;B01J37/02;F01N3/035 |
主分类号 |
B01J35/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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